Apparatus for removing dust from gases



Sept. 21, 1937. J. 5. FASTING APPARATUS "FOR REMOVING DUST FROM GASESFiled Aug. 26, 1956 I NV EN TO R Jbkm filitisirly I a l s ATTO R N EYPatented Sept. 21, 1937 APPAItATUS ron nsmovmc nns'r mom I GASES JohanSigismund Fasting, Copenhagen, Denmark, assignor to F. L. Smidth &Company, .New York, N. Y., a corporation of New Jersey ApplicationAugust 26, 1,936, Serial No. 98,050 In Great Britain August 28, 1935(Cl. 183-52) I 8 Claims.

provide a vessel l6 containing a body of water,

This invention relates to apparatus for removing dust from gases of thetype in which the dustladen gases are caused to pass through a layer ofbodies to deposit the dustthereon. More par- At its lower end, thesupport I3 is formed to and the chains forming the layer enter the waterto be cleaned thereby of the dust particles which they carry. The chainsare then removed from thelower end of the layer in the bottom of thecharging them into a hopper 3| at the upper end 5 ticularly, theinvention is concerned with a novel 5 apparatus for the purposementioned, which invessel and pass over wheels [1, I], at least onecludes' means by which the bodies are periodically Of which is driven.From the second of the cleaned and the solid matter adhering thereto w ethe chains move down o the p f the is removed, these features increasingthe eiiilayer, o tha t e cle d links W ll again take ciency of theapparatus to a considerable degree, part in the collecting operation asthe layer moves 10 In the apparatus of the type referred to as down .thesupp Near t e pp e d of the heretofore constructed, the layer throughwhich layer, a Pa n is p d to cause P p the gases are passed has beenmade up of metal distribution of the chains, so that a layer ofsubballs, crushed stone, chains or the like, and these stentielly un mthickness is p v d d. Pr fbodies require cleaning or replacement fromtime erably, the individual i lie Side y side 15 to time, sinceotherwise the layer will become 0n the Support in Parallel compartmentsformed clogged by the deposited material and will intery pa n m t sown). pose too great a resistance to the passage of the The moving layeris Continually Wet by Wate gase discharged thereto from one or morespray pipes 0 According to the present invention,'the layer is mountedwi the ha be e r the uppe caused to move as a whole in a directiontransend thereof, d the discharging Water e v verse to the direction ofgasfflow, and means are t remove some f t st from the gases before Iprovided for removing the bodies from one nd 1 they reach the layer l5.If desired, the chains the layer, cleaning them, and returning them to my be a d after t ey h e left t e lower the other end of the layer, Suchmovement of end of e layer exposed to e gases and as 25 the layer may beeither continuous or intermit y re passing to th pp end Ofthe layertent, but continuous movement; i preferred, nd by means other than thevessel l6, as for examif intermittent movement is employed, the pep ymeans y be used which discharge riods of rest thereof are relativelyshort. With strong jets of cleaning w ter o e chains, p fthisarrangement andmode of operation, the apembly in t e upward travel o efi st Wheel 30 paratus provides a highly effective removal of so ids frm the gases, and the layer of bodies is The water in the vessel I6 atthe bottom of the kept open so that it offers little resistance to gaslayer is continually discharged into e lowe flow. e d of the chamber Hi,this end being formed For a betterunderstanding of the invention, as ahopper 0 having a discharge Spout 2| reference may b had t taccgmpanying drawthrough which the water and the collected solids ng, inwhich are discharged.

Fig. 1 is a view in vertical cross-section of ne Instead of forming thecollecting layer of chains form of apparatus constructed in accordancewith s l r d i Fi the l y y be made 40 the Principles of the invention;and up of bodies taking the formof balls, chain links, 40

Fig. 2 is a, simfla} vi showing a, modified f rm short pieces of chain,or similar elements which of the new apparatus. are caused to slide'downa perforated support Referring to Fig. -l, the apparatus therein 11-under the influence of gravity. This construclustrated comprises achamber l0, having an inlet tion is illustrated in Fig.- 2, in which thechamber II for the dust-laden gases and an outlet I2 22 avin a as i et23 arid a as out et 24 is p o- 45 through which the cleaned gases aredischarged. vided with a perforated support 25 extending at Extendingacross the interior of the chamber an incline across the chamber andsubstantially and lying substantially at right angles to the transverseto the direction of flow of the gases direction of flow oi\the gasesthrough the chamfrom the inlet to the outlet. This sup d her, is asupport l3, a portion of which, indicated ries a layer of coll bodies 26which move at M, is perforated to permit the flow of gas down thesupport by gravity and are removed therethrough. A layer l5 ofcollecting bodies is through a rotary star gate 21 at the lower end ofmounted on the support 13, and in the construe-. the support. Beyond thegate, the bodies are detion illustrated this layer is made up of thelinks livered to a trough 28, to which cleaning water is r of endlesschains. As the gas outlet is at a supplied through a nozzle pipe 29. Thetrough substantially lower level thanthe gas inlet, the is at a. slightincline, and at its lower end the support I3 has a considerableinclination, and the collecting bodies are delivered to the buckets 30layer of collecting bodies moves down the supof an elevator illustrateddiagrammatically, the

' port inpart under the influence of gravity. elevator carrying thebodies upward and disof the support. .form of the apparatus by waterdischarged upon Thelayer iskept wet in this to the other, across thepath of travel of the" gases, and the collecting bodies are cleaned asthey are removed from the lower end of the layer and before they arereturned to the upper end. The collecting bodies are thus periodicallycleaned so that the layer never becomes clogged, and it offer littleresistance at any time to the passage of the gases therethrough. Thecontinuous discharge of water in the form of a spray upon the bodies inthelayer serves not only to remove dust from the gases but also assistsin cleaning the bodies, and this also increases the efficiency of theapparatus.

I claim: I

1. Apparatus for removing dust from gases which comprises a chamberhaving a gas inletand a gas outlet, a support within the chamberextending substantially transverse to the direction of gas flow from.the inlet to the outlet, a layer of collecting bodies on said support,the gas passing through the layer in its flow through the chamber, saidbodies comprising endless chains, means for advancing the chains tocause the links thereof to be removed from one end of the layer andreturned to the other end thereof, and means for cleaning said chains atthe end of the layer where the links are removed from the layer andbefore said links are returned to the layer.

2. Apparatus'for removing dust from gases which comprises a chamberhaving a gas inlet and a gas outlet, a supportwithin the chamberextending substantially transverse to the direction of gas flow from theinlet to the outlet, a layer of collecting bodies on said support, thegas passing through the layer in its flow through the chamber, saidbodies comprising endless chains, wheels within said chamber about whichthe chains are led, at least one of said wheels being driven and servingto advance the chains to remove the links thereof from one end of thelayer and return them to the other end, and means for cleaning the linksof the chains at the end of the layer at which they are removed andbefore they are returned ,to the layer.

3. Apparatus for, removing dust from gases which comprises'a chamberhaving a gas inlet and a gas outlet, a support within the chamberextending substantially transverse to the direction of gas flow from theinlet to the outlet, a layer of collecting bodies on said support, thegas passing through the layer in its flow through the chamber, saidbodies comprising endless chains, wheels at the upper end of the chamberabout which the chains are led, at least one of said wheels being drivenand serving to advance the chains to cause the links thereof to beremoved from one end of the layer and returned to the other end, .andmeans for directing cleaning fluid on the stretches of the chainsleading from the lower end of the layer to the thereof. A

4. Apparatus for removing dust from gases which comprises a chamberhaving a gas inlet and a gas outlet, a support within the chamber,

upper end a vessel at one end of the support and containing cleaningfluid, a'layer of collecting bodies on the supportextendingsubstantially transverse to the direction of gas flow from theinlet to the outlet, the gas-passing through the layer, and means formoving the layer as a whole along the support and into the vessel, saidmeans operating to remove bodies from the vessel and return them to theopposite end of the layer.

5. Apparatus for removing dust from gases which comprises a chamberhaving a gas inlet and a gas outlet, a support within the chamber, avessel at one end of the support and containing cleaning fluid, a layerof collecting bodies on i the support extending substantially transverseto the direction of gas flow from the inlet to theoutlet, the gaspassing through the layer, means for moving the layer as a whole alongthe support and into the vessel, said means operating to remove bodiesfrom the vessel and return them to the opposite end of the layer, andmeans for directing liquid upon the layer.

6. Apparatus for removing dust from' gases which comprises a chamberhaving a gas inlet and a gas outlet,- a sloping support within thechamber extending generally transverse to the direction of flow of thegases through the chamber, a plurality of endless chains within thechamber having portions in contact with said support, meansforsupporting the portions of the chains out of contact with the support,the chains having a substantially greater length than the circuitthrough which' they move through the chamber whereby a layer thereof ofsubstantial thickness is carried by said support, means for advancingthe chains, and means for cleaning the chains after they have passed outof contact with the support.

'7. Apparatus for removing dust from gases which comprises a chamberhaving a gas inlet and a gas outlet, a sloping support within thechamber extending generally transverse to the direction of flow of thegases through the chamber, a plurality of endless chains within thechamber having portions in contact with said support, means forsupporting the portions of the chains out of contact withthe support,the chains having a substantially greater length than the circuitthrough which they move through the chamber whereby a layer thereof ofsubstantial thickness is carried by said support, means for advancingthe chains, and a vessel containing liquid through which the chains passto be cleaned after they have passed out of contact with the support. I

8. Apparatus for removing dust from gases which comprises a chamberhaving a gas inlet and a gas outlet, a sloping support within thechamber extending generally transverse to the direction of how of thegases through the chamber, a plurality of endless chains within thechamber having portions in contact with said support, means forsupporting the portions of the chains out of contact with the support,the,

chains having .a substantially greater length than the circuit throughwhich they move through the chamber whereby a layer thereof ofsubstantial thickness is carried by said support, means for advancingthe chains, means for discharging liquid on the layer, and means forcleaning the chains after they have passed out of contact with thesupport.

J OHAN SIGISMUND FASTING.

